Optimize your surveillance storage with Advantech certified Hard Disk Drives (HDD), designed specifically for NVR/DVR/PVR/IPTV security systems. You have the option of 2.5-inch or 3.5-inch form factor SATA drives in a wide variety of capacities—ranging from 320 GB up to 6 TB. Every drive is certified, tested and built to operate for 24/7, always-on with support for up to 64 cameras with 4K technology.